Photos: A look at past Iditarod sled dog races

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FILE - In this March 11, 2012, file photo, Dallas Seavey pulls in to the checkpoint in Unalakleet, Alaska, during the Iditarod Trail Sled Dog Race. The world’s most famous sled dog race kicks off Saturday, March 2, 2013, with an 11-mile-long trot through Anchorage. The competition begins Sunday in Willow. (AP Photo/Anchorage Daily News, Marc Lester, file)